The Garden City, Idaho driver returned to the form that brought him the 2012 Domino’s Pizza Legends series championship. Five days earlier in Twin Falls, he found himself spinning around helpless at Magic Valley Speedway after oiling three-quarters of the track when a fitting on his oil cooler let loose mid-race.

Wednesday night, he made a triumphant return, beating Meridian, Idaho’s Mike Cullum by 0.848 seconds in a race run in honor of a former Legends driver (Cahilll) and a one-time Northwest Racing for Smiles honored child (Christopherson).

In other main events:

• Johnny Giesler of Meridian, Idaho became the third man to win back-to-back races in the history of the Bob and Tom Naylor Memorial Classic 50 as the Canadian-American Western Winged Sprintcars Series made its 2013 debut on Giesler’s home track.

• Shelby Stroebel of Meridian, Idaho rebounded from finishing lower than first in an ASA Modifieds main event for the first time since August 2011 and became the first repeat winner of the Sean Miller 40 with a dominant performance.

• Randy Keckley of Boise, Idaho picked up first-place points as the first Budweiser B Modifieds division driver to cross the finish line in the Sean Miller 40. He finished fourth overall.

• Former division champion Joe Barton of Nampa, Idaho turned the tables on Boise’s Larry Hull III to win the Project Filter Pro-4s 30-lap feature. Earlier in the night, Hull had won the division’s four-lap trophy dash and the eight-lap heat race with Barton filling the runner-up role each time.

Giesler couldn’t be touched in the Bob and Tom Naylor Memorial Classic, capturing his first victory of the WWS season and becoming the third different driver to win in the series’ season-opening Northwest Asphalt Sprintcar Speedweek.

Giesler shook off a mediocre beginning to the night to build a 1.563-second winning advantage over second-place Bryan Warf, a fellow Meridian racer, to make sure the Naylor trophy stayed at his house for another year. He became the first back-to-back winner of the race since Davey Hamilton won two of his three trophies in 1988-89.

Giesler has won three of the past four Naylors, joining Hamilton, who also won in 1994in third place on the all-time victories list behind Rick Veenstra (six wins, 1985-86, 1990, 1992, 1996, 1999) Kenny Hamilton (five wins, 1983, 1991, 1995, 2001, 2003).

Giesler now has won five of the 13 features run in WWS history, putting him at the top of the list.

He qualified fifth on a night when Canadian Jeff Montgomery picked up fast time with an 11.464-second lap around the quarter-mile paved oval.

The Langford, British Columbia veteran couldn’t make the quick qualifying time pay off and finished more than two seconds behind Roseburg, Ore.’s Andy Alberding in Trophy Dash A.

Giesler was nearly two seconds behind Victoria, British Columbia’s Matt Mansell, who won the A Heat. Cody Gerhardt of Fresno, Calif., was runner-up, eighth-tenths of a second off the pace.

The Western Winged Sprints run the fourth leg of the five-race Speedweek on Friday with the first night of the BOB FM Diamond Cup XXV. Giesler won last year’s Diamond Cup — and a diamond ring.

Ameristar Diamonds will furnish this year’s ring, which goes to the driver who scores the most points during the two-night event, which will conclude Saturday with fireworks in more ways than one.

Friday is Stinker Stores Family Night. Family passes are available at participating Stinker Stores in the Treasure Valley.

Gates open at 4 p.m. with racing at 6:30 p.m. both nights.

On Friday, adult tickets are $15; and on Saturday, adults get in for $18.

There is a $2.50 military and senior discount each night, and children ages 7-11 get in for $4 less than adult prices. Children 6 and younger are always admitted free.

Stroebel, whose 18-race winning streak was halted by mechanical problems on May 4, jumped back into Meridian Arctic Circle Victory Lane with a vengeance Wednesday.

The reigning ASA Member Track national champion took revenge Nampa’s Jentry Pisca by piling up a winning margin of nearly 2.5 seconds on the quarter-mile oval. Pisca was the man who took the checkered flag on May 4.

The dominating performance gave Stroebel the traveling Miller 40 trophy for the second consecutive year. Stroebel became the third two-time winner of the Miller — joining Tony Ackerland of Star, Idaho (2006, 2009) and Meridian’s Chris Fenton (2008, 2010).

Zubizareta rebounded from a lost weekend Wednesday night to win one of the season’s most prestigious Legends races.

Zubizareta returned to the form that brought him the 2012 Domino’s Pizza Legends series championship. Five days earlier in Twin Falls, he found himself spinning around helpless at Magic Valley Speedway after oiling three-quarters of the track when a fitting on his oil cooler let loose mid-race.

Wednesday night, he made a triumphant return, beating Meridian’s Mike Cullum by 0.848 seconds in a race run in honor of a former Legends driver (Cahilll) and a one-time Northwest Racing for Smiles honored child (Christopherson).

In the Pro-4s feature, Barton had a similar winning margin against Hull, who is a division rookie this year after moving up from the TEAM Mazda Subaru Mini Stocks after the 2012 season.

Only three of the six cars that started the race were on the lead lap when the checkered flag flew after the 30th circuit. Kuna, Idaho’s Kenny Chandler dropped out of the race after only three laps.

Wednesday was the third night of the Canadian-American Western Winged Sprintcar Series Northwest Asphalt Sprintcar Speedweek.

In preliminary action to the Bob and Tom Naylor Classic 50, Matt Mansell of Victoria, British Columbia and reigning WWS series champion Sierra Jackson won heat races. Jackson also raced to victory in the B Trophy Dash, while Roseburg, Ore.’s Andy Alberding had nearly a full-second lead on his closest competitor in the A Dash.

Speedweek continues Friday and Saturday with the BOB FM Diamond Cup XXV, which will be supported by various local classes. Friday is Stinker Stores Family Pass Night, with passes available at participating stores. Saturday’s racing will be crowned with a fireworks show.

Gates open at 4 p.m. with racing at 6:30 p.m. both nights.

On Friday, adult tickets are $15; and on Saturday, adults get in for $18.

There is a $2.50 military and senior discount each night, and children ages 7-11 get in for $4 less than adult prices. Children 6 and younger are always admitted free.